Re: [sage-edu] uh oh

2010-08-20 Thread michel paul
OK, that makes sense. Yeah, that would be an important point to mention to students. Thanks. On Fri, Aug 20, 2010 at 12:43 PM, Mike Hansen wrote: > On Fri, Aug 20, 2010 at 12:31 PM, michel paul wrote: > > sage: _ / -3 > > x |--> x > (8/3) > > > > The '>' should be '<'. > > A conscious decis

Re: [sage-edu] uh oh

2010-08-20 Thread Mike Hansen
On Fri, Aug 20, 2010 at 12:31 PM, michel paul wrote: > sage: _ / -3 > x |--> x > (8/3) > > The '>' should be '<'. A conscious decision was made for this not to be the case since one has to check whether or not the operand being applied is less than or greater than zero. In your specific case, it

[sage-edu] uh oh

2010-08-20 Thread michel paul
I like how in Sage it is so easy to emphasize for students what an equation is. An equation (or inequality) is a relation between expressions: f(x) == g(x). It's then very easy to show a solution process step by step. However, I just noticed this: sage: f(x) = 2*x + 5 sage: g(x) = 5*x - 3 sa